I have bat house boxes in my yard because they love to eat bugs. I've read that some species of bats eat equal to what they weigh every night in mosquitoes and bugs. They are mammals, and they have mouth's. While they are in flight they lock in on the bug with their senses, hearing, smelling, the hair on their body and head, vision (although vision is extremely limited) and sort of open up wide their mouth and bam got it! I've also heard they rarely miss. If you imagine a laser that locks in-on a target in a video game, when it locks in and kaboom target disintegrates! Once a bat locks in on its prey with a radar/sonar exactness the bug is a goner!